I have a work: that how to read an microsoft excel file.
For example: I have an excel file with multi sheets. (that I don't know what does these sheets' name). And my work is:
1) how to scan this file to find what sheets does it have and what's name.
2) after that, I want to read an exact cell that I want. for example: I want to read <programming sheet><cell A93>.

I think this work need a library to work, and I don't know it. I play with algorithm very much, but I never do something like that before. So, who can help me, please

thanks for all